JPS5572955A - Non-contact seal apparatus - Google Patents

Non-contact seal apparatus

Info

Publication number
JPS5572955A
JPS5572955A JP14421878A JP14421878A JPS5572955A JP S5572955 A JPS5572955 A JP S5572955A JP 14421878 A JP14421878 A JP 14421878A JP 14421878 A JP14421878 A JP 14421878A JP S5572955 A JPS5572955 A JP S5572955A
Authority
JP
Japan
Prior art keywords
seal
rotating shaft
pressure side
section
cylinder section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14421878A
Other languages
Japanese (ja)
Inventor
Muneo Mizumoto
Ko Inoue
Masahiro Yoshioka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14421878A priority Critical patent/JPS5572955A/en
Publication of JPS5572955A publication Critical patent/JPS5572955A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PURPOSE: To accomplish a non-contact seal positively preventing the leakage due to the generation of bubble by arranging a circular stepped section in the inner surface of a casing surrounding the rotating shaft and a screw seal on the circumference of the cylinder section provided on the rotating shaft.
CONSTITUTION: A circular stepped section 3 is formed on the inner surface of a casing surrounding the rotating shaft 1 and demarkating the high pressure side zone and the low pressure side zone. The cylinder section 4 provided on the rotating shaft 1 is provided with a circumferential surface 4a facing the inner surface of the circular stepped surface 3 with a clearance G1 and an end 4b facing the stepped surface 3b of the circular stepped section 3. A screw seal 5 is provided on the outer surface 4a of the cylinder section 4 and a seal fluid 6 is sealed into the clearances G1 and G2. With such an arrangement, the seal fluid in the clearance G2 is given a centrifugal force with the rotation of the end 4b of the cylinder section. Thus, the fluid 6 is fed to the low pressure side of the screw seal to check the generation of bubble on the low pressure side.
COPYRIGHT: (C)1980,JPO&Japio
JP14421878A 1978-11-24 1978-11-24 Non-contact seal apparatus Pending JPS5572955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14421878A JPS5572955A (en) 1978-11-24 1978-11-24 Non-contact seal apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14421878A JPS5572955A (en) 1978-11-24 1978-11-24 Non-contact seal apparatus

Publications (1)

Publication Number Publication Date
JPS5572955A true JPS5572955A (en) 1980-06-02

Family

ID=15356980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14421878A Pending JPS5572955A (en) 1978-11-24 1978-11-24 Non-contact seal apparatus

Country Status (1)

Country Link
JP (1) JPS5572955A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6163077U (en) * 1984-09-29 1986-04-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6163077U (en) * 1984-09-29 1986-04-28

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